dixon



(No Model.) R. M. DIXON.

000K. .N0.540,727. Patented Junell, 1895.

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'f b wr lllllllummlllII @.14 6 l i l I UNITED --Sfr- AIES PATENT OEEICEo ROBERTA M. DIXON, ,0E EAST ORANGE, iNEvv JERSEY, ASSIGNQR To SAFETY GAE HEATING AND LIGHTING 'GQMEANY j 0E NE't'v JERSEY.

To all wiz/ 0m it may coni/cern:Y y

COCK@ SPECIFICATION forming part or Letters Patent No. 540,72*?, dated :rune I1, ieee,Y

Application ined Mani 17,1`s94. serial No. 504,051. nto model.)

Be it known that'l, ROBERT M. DIXON, of East Orange, county of Essex, State ofNew Jersey, have invented certain new and useful Improvements in Cocks, of which the following is a specification, reference being had to the accompanying drawings. i

The object of my invention is to provide improvements in cocks especially designed for steam heating purposes, in which all danger of leakage into a car or chamber in which it is employed is avoided.

Great difficulty has been experienced in practice in making, by the ordinary'methods, an yabsolutely steam-tight cock and one'which will remain so for any considerable period of constant use. By my invention I provide means for preventing the escape of V steam through the case and means for draining off any water of condensation that may be occa` Sioned by leakage around within the case. y

In the accompanying drawings, Figure l is a top plan'view of my cockcase. Fig. 2 is an elevation, partly in section, thereof, the'valve therein being shown as a kthree-Way valve, which, however, is not an essential feature of the invention. Fig. 3 is a section on the line 3 3 of Fig. 2, the valve and stem being shown in elevation. Fig. 4'is `a similar section on the line 4 4 of Fig. 2, in Vwhich it may be noticed that the line ofsection indicates that parts of the case are omitted.

Referring to the figures on the drawings, l

the bearing part indicates the case of my cock which may be* made of any suitable construction and having exits and entrances as adapted to the purpose for which it is to be applied. In the drawings it is shown with three ports indicated by 2, and has a tapered bore 3 within which tightly fits a tapered valve 4 provided with a stem 5 for operating it. The valve, as shown, has three ports 6 tocorrespond with the ports in the case, but the numberand arrangement of the ports are merely incidental and are not involved in the gist ofthe invention itself.

It isamatter of ordinary usage to construct a cock with a tapered bore and a tapered valve, the parts being generally ground together in order to secure a tight joint. It is ascertained made integral with the case.

-cap l0 of ordinaryV construction.

in practice, however, that with the utmost care, leakage is aptto occur between the valve and .its bore, if not `when they are originally fitted,

at least after they have been used for any considerable length of time. It is to avoid the escape of steam through such defective bearings that my invention is devised. To accomplish `this object IV provide a wall 7 opposite the small end of the valve that entirely 6o closes the case at that end, preferably being Between the end of the valve and the wall 7 a chamber 8 iSprVided, both to afford endwise movement ofthe valve such as may be occasioned by sation that r'nay leak around the valve into it.` To theV other end` ofthe case, within a screw threaded aperture 9, I provide a ianged 7o The joint between thecap and the case is preferably a finished one similar to that used on all globe valves and which can be made tight without difficulty. A spring 1l coiled around the 75 stem 5, and retained by the cap 10, serves to hold the valve in place. A chamber 12 between the valve and the cap is designed, like the chamber 8, to 'receiveany Water of condensation which may escape around the bear- 8o 'ing'parts of thevalve into it.

It is possible by the employment lof suitable packing 13 and agland 14 in the neck 15 vThe gland may be adj ustably secured in place by an oblong collar 16 and the ordinary ac justment bolts and nuts 17.

4Having provided chambers at each end of the valve to receive the water of condensation 9o which may escape into them, I prefer to employa duct 18 communicating with each valve and with a discharge port 19 bywhich the water of condensation may be conducted away as it accumulates. Theinterior of the 9 5` port 19 is shown screw threaded, as at 2'0, so that it may accommodate a drain pipe by which it may be dischargedv at any desirable point.

What I claim is- 1. In a cock, the combination with a case and valve, of an inclosed chamber in the cas- IOO ing beyond one end of the valve, a doot enbers, and having an outlet communiczitiug,r to tirely Within the casing communicating didirectly with the exterior of the valve easing, rectly with the chamber and with the extesubstantially as specified.

rior of the cock casing, substantially as speci- In testimony of all which I have hereunto 5 fied. subscribed my name.

2. In a cock, the combination with the case, ROBERT M.` DIXON. and valve therein,` of chambers above and Witnesses: below the valve, a duct entirely Within the ELMER E. ALLBEE,V

casing and communicating with both cham- D. W. PYE. 

